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Migratory species are often exploited by resident predators. Here, the authors review the extent to which prey induce large-scale movements of predators, and outline a framework for the ecological consequences of coupled migrations.
The bilaterian mouth and anus evolved from a simple gut with one gastric opening. Here, the authors review comparative data on several organisms and conclude that the single opening probably evolved into both mouth and anus (amphistomy).
Individual differences in behaviour have been of great interest to behavioural geneticists in recent years. This Review examines the genomic tools available to study such differences, and the pitfalls to avoid.
The poor reputation of predator and scavenger species belies their benefits to people, which include disease regulation, contributions to agriculture and waste disposal. These services should be emphasized in conservation considerations.
